The announcement by Arizona Sen. Kyrsten Sinema, a Democrat-turned-independent, that she would not seek a second term was hardly a surprise.  But it shook up a key Senate race in a body where Republicans are closing in on a majority.  Ron Hansen of the Arizona Republic lays out what’s ahead between likely nominees Ruben Gallego (D) and Kari Lake (R). And Jacob Rubashkin, the deputy editor of Inside Elections, sums up the major results from Super Tuesday and looks ahead to next week’s Ohio Republican Senate primary, the winner to take on three-term Democrat Sherrod Brown. Plus:  A highly combative Joe Biden and a highly caffeinated Katie Britt highlight the State of the Union. Music in this Episode: Deja Vu by Crosby, Stills, Nash & Young You Lost by Austin Archer Tuesday’s Gone by Lynyrd Skynyrd